Combination centering and measuring instrument.



C. C. JACOBS. COMBINATION CENTERING AND MEASURING INSTRUMENT.

APPLICATION FILED FEB. IB, 1914 RENEWED MAY-24.19l5.

Patented Dec. 14, 1915.

Attorneys COLUMBIA PLANouRAPH C0.. WASHINUTQN. D. C.

lUbTFf ATS @TEN Ff.

CHARLES C. JACOBS, OF AKRON, OHIO.

COMBINATION CENTERING ANI) MEASURING INSTRUMENT.

Patented Dec.. 14, 1915.

Application filed February 18, 1914, Serial No. 819,478. Renewed 'May24, 1915. Serial No. 30,230.

To all whom t may concern Be it known that I, CHARLES C. JACOBS, acitizen of the United States, residing at Akron, in the county of Summitand State of Ohio, have invented a new and useful Combination Centeringand Measuring Instrument, of which the following is a speciication.

The present invention appertains to measuring instruments, and aims toprovide a novel and improved tool or instrument of that nature.

It is the object of the present invention to provide an instrument ofunique construction, whereby the same may be employed for readilydetermining the diameters, radii, weight per unit lengths, or other datawith respect to various cylindrical or circular objects.

Another object of the present invention is to provide a device of thenature indicated, which may also be employed as a centering medium forshafts, and various other cylindrical or circular objects.

A further object of the present invention is to provide an instrument ofthe character specified, which may be utilized as a height and depthgage, and as an angle gage.

It is also within the scope of the present invention', to provide aninstrument for the purposes above intimated, which shall becomparativelv simple, compact, substantial and inexpensive inconstruction, as well as being simple, convenient, practical, serviceable and efficient in its use.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafter-deAscribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, can be made within thescope of what is claimed, without departing from the spirit of theinvention.

The invention has been illustrated in its preferred embodiment in theaccompanying drawing, wherein :-A l

Figure 1 is a yfront view of the improved instrument, portions of theblade or beam being broken away. Fig. 2 is aback or rear View, of theinstrument,` portions of the blade or beam being broken away. Fig. 3 isa sectional view taken on the line 3-3 `of Fig. 1. Fig. 4 is a sectionalview taken on the line 4-4 of Fig. 2.

In carrying out the present invention, the instrument embodies a frameor body 1, which is preferably stamped, or fashioned from suitable sheetmetal., and which comprises a circular or arcuate rim portion 2extending through an arch of 270 degrees and having at its end portions,a rentrant angle portion 3, the arms or blade portions of which arepreferably disposed at right angles with respect to one another.

Riveted orotherwise secured to the face or one side of the body or base1, is a strip or cleat 4, which has one edge suitably grad uated as at5, and arranged on a line bisecting the angle defined by the arms of theangle portion 3. The graduations or scale 5 mav be of any suitablecharacter, according to the nature of the worlr to be'accomplished byVthe instrument, as will be apparent to the skilled mechanic, thegraduations reading upward from zero toward the corner of the angleportion 3.

A gage or measuring strip or member 6 1s slidably mounted upon the bodyor frame 1, adjoining the cleat 4, one edge of the gage strip 6 slidablyengaging the graduated or fiducial edge of the cleat 4, so as to lie onthe line bisecting the angle portion 3. The gage strip 6 is relativelylong, and is provided with longitudinal slots 7 adjoining its ends,through which guide and retaining screws 8 pass, yto take into the bodyor plate 1, to retain the gage strip 6 in place, and to permit the sameto have limited sliding movements along the graduated cleat 4, wherebythat end of the gage strip 6 adjoining the v'angle portion 3, may beprojected beyond the corner of the angle portion, or may be retracted soas to lie upon or adjacent the said elbow Aor corner. l 1t will beobserved that-the cleat 4 also assists in guiding the gage strip 6 forrectilinear or reciprocatory movements, thegage strip 6 being providedwith a scratc or pointer 9 cooperable with the graduations 5, toindicate upon the graduations, certainrfunctions as willhereinafter morefully appear.

The present invention further includes a somewhat semi-circular plate 10resting snugly or flatly against the back of the body or frame 1, andpivoted to the center portion of the body 1 by meansf of a counter sunkpivot screw` 11, to permit the body 1 and plate 10 to oscillate orrotate with respect,v to one another. The plate 10 is provided with acurved edge 13 spaced inwardly slightly from the curved edge of the body1, and curved about the pivot 11 as a center. Opposite the curved edge13, the plate 10 is provided with a straight chordal flange or lip 12turned away from the body or frame 1. The flange or lip 12 preferably isso arranged, as to fall upon or aline with the respective edges of theblade or jaws of the anglel portion 3, when the body 1 and plate 10 areproperly set or swung relative to each other.

The plate is provided vwith a curved or arcuate slot 14 adjacent thecurved edge 13, and a counter sunk bolt 15 engages through the body 1,through the slot 14:, and bears a binding or clamping nut 16 arranged toseat or contact with the plate 10 over the slot 14C, to clamp the plate10 at any adjusted position with respect to the body. The bolt 15 ispreferably disposed upon the line which intersects the angle portion 3,but the body or plate 1 is provided with supplemental bolt holes orapertures 17, for the reception of the bolt 15, should it be desired tochange the position of the bolt when circumstances necessitate orrequire.

A pointer, 18 is carried by the curved edge 13 of the plate 10 andcoperates with a scale of protractor graduations 19 inscribed. orotherwise provided upon the curved edge portion of the body or plate 1at the back of the said body. The graduations 19 are intended toindicate the angularity of the plate 10 with respect to the body 1, aswill be obvious.

A clamp or holding member or strip 20 is carried by the central portionof the plate 10, the strip 20 having a longitudinal slot 21 at one end,through which a bolt 22 is passed, the bolt having a. flat head engagedthrough and countersunk within the plate 10 adjacent the pivot 11, or atthat side o-f the pivot, opposite to the flange or lip 12, as seen inFig. 4. A binding or clamping nut 23 is threaded upon the free end ofthe bolt 22 to clamp the strip 2O at any adjusted position, the saidstrip being adjustable to and from the clamp or lip 12, when the nut 23is loosened. The end of the strip 20 having the slot 21, isv disposedremote from the flange or lip 12, while the other end 24k, is offsetaway from the plate 10, to receive thereinl under, a blade 25 of ac0mbination square, or a graduated beamof anysuitable character. Thus,one edge of the blade or beam 25 is designed to rest against the flangeor lip 12, while the other edge engages under the clamp or holdingmember 20, the-clamp 20 being readily adjusted snugly against the lastmentioned edge of the blade or beam 25, in order that when the nut 25 istightened, the blade or beamhwillbe firmly. held in place upon the blade10.

The present instrument may be employed in divers capacities. Thus, itmay be employed for laying out work upon a table, in various manners aswill be obvious to the artisan, from the character of the instrument.The instrument may be conveniently employed for determining thediameter, radius, weight per unit length, or other data concerning theshaft, pipe or the like. To this end, the graduations 5 are preferablyset, so as to indicate, directly, or through the medium of properconstants, the diameter, radius, circumference, weight, or the like, ofa cylindrical object to which the instrument is applied in a mannerwhich will be presently amplitied.

To determine the diameter, radius, circumference, or other datarespecting a cylindrical object, such as a shaft the angle portion 3 isapplied to the shaft, indicated in dotted lines in Fig. 1 and the gagestrip 6 is then moved or slid toward and against the shaft, in whichevent, the scratch or pointer 9 will indicate upon the scale or graduations 5, the diameter, radius, or other information desired. r1`hescratch or pointer 9 arranged. so as to aline with the zero graduationsof the scale 5, when the end of the gage strip 6 adjoining the angleportion 3 lies directly upon the elbow or corner of the said angleportion. Thus, when the angle portion 3 is applied to a shaft or othercircular object, of relatively small diameter. the space between theelbow or corner of the angle portion 3 and the shaft will be relativelysmall, while when the angle portion 3 is applied to a shaft orcylindrical member of relatively large diameter, the space between theshaft and the elbow or angle portion 3, will be of increasedproportions. ln this manner, when the attachment is applied to objectsof various diameters, the movement of the gage strip G toward andagainst the various objects will be proportional directly to thediameters of the objects, whereby the diameters 0r other data concerningthe objects, will be properly indicated upon the scale 5.

The scale 5 may be graduated, to indicate either the diameters of theobjects, or the radii, circumference or the like, or the scale 5 may begraduated to indicate the weight per unit length of the shafts or otherobjects to which the angle portion 3 is applied. It is also possible toemploy in connection with the scale 5, certain constants for use inconnection with the indications upon the scales to determine theinformation desired.

1t is to be noted that one edge of the gage strip 6 lies upon the linebisecting the angle portion 3, in order that the said edge of the gagestrip 6 may move along one diameter of the shaft or other object, to andfrom the center of the shaft, whereby the shaft may be readily centeredthrough the medium of the present instrument.

The improved instrument may also be employed as a height or depth gage,or the like, by applying the blade 25 of a combination square, or anyother suitable graduated rule or beam, to the carrier plate 10 in themanner above described, and as illustrated in the drawing.

It will be noted that the blade or beam 25 may be readily applied to anddetached from the carrier plate 10.

In using the instrument as a height or depth gage, or the like, theplate 10 and body 1 are so adjusted with respect to one another, as tobring the blade 25 at right angles to the line intersecting the angleportion S, this being readily accomplished through the medium of thepointer 18 carried by the plate 10 and the graduations 19 upon thebody 1. The plate 10 may be clamped against the body through the inediumof the bolt 15 and nut 16 as indicated. rIhen, when the nut 28 isloosened, the body 1 together with the plate 10 may be slidlongitudinally along the blade 25 in order that when the angle portion 3is applied to a shaft or other object, there will be indicated upon thegraduations of the blade or tongue 25, the distance of the center of theshaft or other object, from the end of the blade 25, which may be seatedagainst the floor, or other object, from which the measurement is to betaken.

It will be obvious that the present instrument may readily be employedas a height or depth gage, without further description being necessary.The present instrument may also be employed as an angle gage, byadjusting the carrier plate 10 and the body 1 with respect to oneanother, in order that the angularity of the angle portion 3 withrespect to the blade or beam 25, may be indicated upon the graduations19 by the pointer 18. For example, supposing a certain indication uponthe scale of the blade 25, is not in alinement with the center of theshaft or object, the body or plate 1 may be adjusted or oscillated, inorder that the angle portion 3 may properly engage the shaft, and at thesame time, the angularity of the body or plate 1 may be indicated uponthe scale 19, to indicate the angle in which the center of the shaftlies With respect to the predetermined graduation or indication upon theblade or beam 25.

In view of the foregoing, taken in connection with the drawing, theother advantages and capabilities of the present invention will beobvious to those versed in the art to which the present inventionrelates, it being noted that the objects aimed at have been carried outsatisfactorily.

Having thus described the invention, what I claim as new is 1. In ameasuring instrument, the combination of a body having an angle portion,a carrier plate pivoted to one side of the body and having a lip turnedaway from the body, and a clamp carried by the carrier plate andcoperating with the said lip for receiving and holding a blade, the bodyand carrier plate having a cooperating scale and pointer.

2. In a measuring instrument, the combination of'a body plate having anangle portion, a carrier plate pivoted to one side of the body plate andhaving a lip turned away from the body plate, and a clamp having one endportion adjustably mounted upon the carrier plate and having its otherend portion oifset and cooperating with the said lip to receive and holda blade, and the body and carrier plate having a cooperating scale andpointer.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

CHARLES C. JACOBS.

lVitnesses H. C. SPIGER, MARTHA HUGGLER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents. Washington, D. C.

